by gg3 » Thu 22 Feb 2007, 04:11:47
Very
very
interesting.
Oh how I would love to know the hypotheses they're testing with this, and how they've operationalized the variables.
Luis von Ahn has three "games" running right now: "The ESP Game," "PeekaBoom," and "Phetch" (Fetch). His research interests include human computation, pattern recognition, cryptography, and steganography.
In each case, you log in and get randomly assigned to one other person, or, in the case of Phetch, a bunch of people.
In The ESP Game, you and your random partner each see an image on the screen and attempt to type a series of words that describe it. There is already a list of words that are "obvious" and are excluded, so you have to look for less-obvious ones. When you & your random partner type the same words, you get a new image, and the goal is to get through 15 images in 2-1/2 minutes (average of 10 seconds per image). Point values are assigned for degree of non-obviousness of word hits.
Strictly speaking, it doesn't take ESP (nonlocal perception/action) to score on this. That is, the brain has an enormous amount of latent information processing capability and can pull a remarkable amount of information out of a relatively small amount of target or input data. And it would appear that both parties have the same target (or do they?) so there are no hidden variables except for the perceptual and cognitive skills & priorities that the other player has when evaluating the target.
So why would von Ahn call this an "ESP" game...?
A few things are fairly well established about nonlocal perception & action: The effects are robust (i.e. similar statistical deviations occur throughout the research). They are pervasive (they are a constant part of the perceptual/cognitive background activity and can be found in research data sets that were not even looking for them, see also "retrocausality"). They are relatively small (the statistical offsets are small and become obvious only over a large number of trials). They are "psychologically lawful" (they conform to patterns established for other perceptual, cognitive, and suchlike skills, for example performance increase with feedback, and performance decline under hostile scrutiny). Last but not least, they appear to conform to other physical models & examples of nonlocality & entanglement (for example including the need for "local" communication to confirm results).
So we could hypothesize that people who are above average at nonlocal perception/action tasks might do slightly better at the ESP Game task than people who are average or below. The game's scoring system could select for such people by rewarding their performance advantage compared to others. But here we are only talking about a few percentage points of advantage. This might be a helpful efficiency increase if the goal is, as stated, merely to label web images in order to simplify image searches, but in a way it seems like a "too mundane" application of a capability that has potentially far more interesting uses.
Note that the Game assigns higher point values to images with more excluded words, and thus, with fewer obvious descriptors. Thus there is an advantage to seeking out the less-obvious descriptors. Since the available "local" information is less, the use of nonlocal information could make a bigger difference in outcomes. But toward what end...?
The general case here is "the ability to make concordant observations of obscure or non-obvious details from a shared data-set." Beyond that, the general case here is to train people in that ability by giving them positive feedback for successfully using it.
I have some intuitive speculations about this one, in terms of how it could use nonlocal perception to leverage results in cases where the outcomes are more important than simply cataloging every image on the web. Think about maps, faces, buildings, vehicles, etc. Think about identifying targets such as hostile troops, missing persons, vehicles used in criminal activities (e.g. kidnapper's car). Think about picking sites for geological exploration for minerals, picking investments for a portfolio, etc. As a generality, cases where something of high value is at stake: lives, large sums of money, etc. A persistent slight advantage in such cases could have a significant impact on outcomes.
I'll have more to say about von Ahn's other games in the next few days...